And thus also your files from the VFS.
What was your EGroupware version?
There are several contributions to this here in the forum. Please take a look at them first.
I mean, the problem could be access to the database (not running, password, …)
EGroupware brings everything with the installation. Even in the 19.1 docker installation the database is located on the host. Take a look:
Our commercial support is of course also a possibility. If this is for a company and you need to go fast, you should consider this.